Burglar and fire alarm



w.1. DRIVER. BURGLAR AND FIRE ALARM.

APPL ICATION FILED APR. 14, I920. May 10 2 SHEETS-SHEET I.

W. L DRIVER.

BURGLAR AND FIRE ALARM.

APPLlCATlON HL'ED APR.14, 1920.

1,377,324. Patented May 10, 1921.

2 SHEETS-SHEET 2- f alarm, andsoinetimes in case of a fire in direction indicated: by the arrows.

. wrn IAi/r J. "DR VE OFICVHIQCVAGQILLINOIS.

P-ATENT r.

Boner-An AND FIRE ALARM.

T 0 all ibhom it concern:

Be it known that I, 'WILLIAM J. DRI ER,

a citizen of the'United JStates,:residing at Chicago, in the county of Cookrand State of -1llinois, have invented certain newand useful Improvements .in Burglar. and Fire Alarms, of whichthefollowingis a specification. 7 V

This invention relates to improvements in a device employed fOl' IlSBQiIL connection with doors, windows, transoms and the like, for sounding an alarm in the movement of either in the operation of opening the same, and in some instances, for. producing .an

alarm in case of fire, and it consists in certain novel features of construction and arrangement of the parts thereof as will be herein after more 'ully set forth and specifically claimed. y I

The principal object of the invention is to provide a mechanical alarm giving device the parts of which shall be so constructed and arranged as to reduce the cost and simplify the manufacture thereofby dispensing with elements or parts heretofore generally employed in doors foralike purpose' A further object is to provide an alarm,

the parts of which shall be so constructed that they may be arranged in such a manner that the door or windo w,jin conjunction with which it is .used,rmay be opened or closed without giving an" alarm, yet may be adjusted or arranged sov thata slight movement-of theudoor or one of the window sashes, in opening'the same, will sound an the room, an alarm will be given.

Other objects and advantages of the invention will bedisclosed in the following on line .22 of Fig. 1. lookinguinthe Fig.4 is a similar view-to 'talien on the same line .but showing the locking and releasing bar by continuous .linesin its un Specification'of Letters Patent. Patented pl y 10" 1921; 2 Application filed April 14, 1920. Serial N0 373,715.

locked position and by dotted lines inits locked position. V

Fig. Sis a face view of a portion of a door frame and a part of a door adapted to openoutwardly from the rim showing the alarmin placeon the door.

lies..-

Fig. 6 is. an enlarged detached face view I of atrip for the locking and releasing-bar of the alarm showingsaid trip mounted on -a supporting plate therefor, and illustrating by dotted lines one of themovements of'the trip. 2 v

Fig. 7 is a face view of a portion of a-door frame and a part of a dooradapted to-open into a room showing the alarm in .place on the latter.

Fig. 8 .is a detached face view of a trip for the locking andreleasingbar of the k alarmxwhen used on an inwardly opening door, showi ng it mounted on its supporting plate, and illustrating it bycontinuous lines in the position to be automatically seton closing. the door for tripping said baryon opening the door, and by dotted lines in its inoperative position.

Fig.v 9 is a side view of the parts shown in iFlg. V v Fig. 10 isa faceview of a part of a window frame shortened forthe convenience ofillustracizion, showing the alarm attached thereto, an 7 1 Fig 11 is adetached perspective view 'of-a clamping ring used' in connection with the alarm'when it is appliedto ajwindow or an outwardly opening door. 2 v

Referring now more particularly to- Figs. 1 to 4 inclusive-of the drawings, the reference numeral 23 designates'the base tplate of the alarm, whichis provided atits periphery witha number ofapertured lugs 24 to rest againsta door or the frame of a window, an'd to be secured by means of screws 25 thereto; The plate 23. is provided with .a plurality,

usuallythree, 10f forwardly extended projections :26, which are struck'up from-"the metalof the plate, and each is providedon its free end, with a tongue :27 to extend through-suitable openings in a casingplate 28 and thefeet or-lugs 29=ofta spider frame 30, whiclris mounted 'onthe frontiface ofithe plate 28. .fCentrally j ournaled in the plate, 23 is the .centerpost or spindle 31 the outer end ofhwhich is screw-threaded for engagement with a suitable opening centrally locatedfina bell which is of suflicient size to encome pass the plate 28 andspider 30, and also to f cover the interior mechanism of the alarm.

The plate 23 is provided atits periphery witha' guide 33 for one edge of thelokihg and releasing bar34, and inwardly of its .pe-

riphery with another guide 35 for the op-' posite "edge. of said bar. These guides overla'p the bar 34 at its edges so as to hold the same between'the plate 23 and'the guides,

yet in such a manner that said bar may have longitudinal movement on. the base plate.

Near its middle portion the bar34 is'provided with a longitudinal slot 22 for the reception of the spindle 31, which also acts as I a guide for thebar, as well as for a'pivot therefor, in certain of itsmovements. .The

outer end of the bar 34 is byipreference pro- Vided with a horizontally extended proj c tlon igehaving all opening-37 therein. The

'innerend of the bar is provided with a for-Q wardlyextended detent 38 to engage and release the arm of the bell hammen. Secured at one of its ends to the plate 23 is a spring 39 the other end of which is securedto the bar 34 between the post 31 and the projection on said bar. i x As is clearly shown "in'Figs. 3 "and4 the bar 34 is providedon its side adjacent to the 1 wardly extended projections 46 terminating 7 guide 33 with a recess 40 to engage said gu1de,-and on the opposite edge with a recess 41 -to" engage. the guide 35 under certain conditions. The openings in the casin 'plate'28for the reception of the tongues 2 on the projections 26 are located near the pe-I I riphery of the casing plate, and as shown. in

Fig. 'lthe spider=30is -provided withreare in feet 29, each of which has an opening therein forthereception of said. tongues,

which after being inserted through openings in the plate 28 andiin the feet of the spider can be twisted slightly by means ofasuitable instrument sofas to clearly hold the said plate and spider together, which members are centrally mounted on the post 31 'as shown; The post 31 is fprovided inits wall withaprojection 42 to engage an opening 43 in one end of the main spring 44 which is located between the plate '28- and spiderffiii and coiled around the post: rand has its other end secured to one of .the'rearwa'r d projections 46 0f thespider, which'p'rojecs tion .is provided with a laterally extended luge47 to engage an" opening 48 in the main spring. By this arrangement inw'ill dun-i ide'rstoodth'at as the springis secured "at one of its ends to 'the post 31ffwhich 'is 'revolubly mounted-on the plate 23 and at its right;

other end to the spider, the spring can be wound upby turnin the bell 32v which is'in' screw engagement the post 31 to the Mounted" on 'su'itablefstuds 49" :journale'd onthe' base plate 23- and between xit and the. P 2 99 are atmiflaf s s vhiee when arm, which pin has its ends enlarged or upset so as to allow of vibrationof the hammer in its stroke against the bell.

The main gear 51 is provided on its front facewith a lug 56 to which is secured one end of a spring 57 which isformed into a coil of suflicient 'size to fit snugly in the opening of saidjgear and to surround the post 31 of the mechanism, as will be clearly understood" by reference to Fig. 2 of the drawings' By this arrangement it-is apparent that the tension of the spring57 will act on the main post 31 in such a manner as to dispense with the use of a ratchet pawl as is commonly employed. r a

The operation of the alarm-is as follows: When used in connection-with a window as 'ShOWIl in 'F ig.10, the face plate 23 is secured to the window frame in such a way that the locking and releasing bar34 will occupy a slightly inclined vertical position, aS shown, but when the alarm is used in connection with a door 58 to which it is secured near the edge thereof adjacent to the frame pin 55rextended through suitable openings 1n the hammer and stud 59, the bar 34 will be located in a horizontal position as shown in'Figs. 5 and 7 of the drawings. When used in connection with a window or a door opening outwardly from the room, a link'60, see'Figs. 5,10 and 11, having'atoneof its endsahook 61 toen- Qa'gethe opening 37, in the projection 36 0f the bar 34andhaving at its other end a coil 62 of at 'leasta pair of convolutions to provide a clamp, is employed.

.. Extended between the convolutions of the coil 62 is a cord 63 which is extended through an eyelet or screw eye 64 mounted on the upper sash 22 which cord is from thence extended downwardly and secured at 7 its other end to the lower sash 21 at any suitable point thereon. When thus connected tothe sash, assuming that the same" are intheir closed positions, the bar 34 will be held in about the position shown in Fig. 4 by dotted "lines, and in Fig. '10 by. full lines, in which former figure it will be observed'that the recesses 40 and'41 of the bar 34 are located out oflocking engage 'mentlwith the guides 33 and '35 for saidbar.

Now, on aslight movement of either of the allowing the spring. 39 which 7 actuates the bar 34 to retract the same, in which operation the detent 138 on said bar will .bedis engaged from thew-arm ,53.;of the hammer, thuspermitting the hammer to strike the ,bell and soundflanalarm. Thealarm will continue tosound until thebar 34 is project'ed to the position shown in Fig.3 when,

it is obvious, that the recess 40*will be en gaged by the guide 33 thus causing the 'detent 38. to lock the hammer arm. As the cord is, slightly inclined,and as it can be g. made tautby passing the lower portion thereof between the coils 62 of the link it will be understood that when the alarm is used in connection witha window' the bar .will be'heflol in 'such position as to be out of locking engagement with its guides until releasedby slacking the cord, in the operation of moving either of the sashes to open the same, after which the bar will be retracted to the position shown by continuous lines inFig. 4, when, byreason of the pivotal movement of the bar on the post 31 and the inclination of the cord, the

recess 41 will be caused to engage the guides 35, which will prevent the bar being projected, except from within the room, and thus will allow the bell to be rung until the main spring has exhausted its tension.

When the alarm is employed in connec-- tion with a door opening into a room, as shown in Figs. 7 to 9 inclusive, a supporting plate 65 having spurs 66, struck up therefrom, may be secured to the wall of the door frame 59 adjacent to the free edge of the door, as is clearly shown in Fig. 7 of the drawings. The supporting plate 65 is provided with a grommet-like bearing 67 at its outer end, on which is mounted and frictionally held a collar 68 which may have a handle 69 for turning the same, and said collar is provided with a pair of angular teeth 70 and 71 located in its periphery. When used on the door the' main plate 23 of the alarm is secured thereto in sucha manner that the bar 34 will extend horizontally from said plate and beyond the free edge of the door, as shown in Fig. 7,

in which position the bar will be located by reason of the recess 40 of the bar 34 engaging the guide 33 on the base plate.

Assuming that the-handled collar 68 is in the position shown in Fig. 8 of the drawings, and that the door is closed, it is obvious that the bar 34 will strike the tooth 71 thus causing the collar 38 to be turned to about the position shown inFig. 9, when it is apparent that'the tooth 70 will be located with its inclined surface in the path of the bar 34,'when on opening the door said bar will be released from the guide 33 and retracted by means of the spring 39,

thus unlocking or releasing the hammer arm and er i g the a a m t0 be sounded.

7 If it is desired to open and'close the door 7 i iwithoutointerference by the tooth collar, it

is only necessary to turn the latter to'about the positionfshown in Fig. 8 by. dotted lines, when theteeth or projections 70 and 71 will be located out of the way of the releasing bar. When the alarm is applied to a door opening outwardly of a room as shown in Fig. 5,; the baseiplate 1 23 is secured: to v the door 58 onits inner surface-and near its hinged edge so that the bar34 of the alarm will ,lie in substantially horizontal position.

ith this arrangement I prefer to employ a tripping mechanismshown inrdetail in Fig. which consists of a supporting plate 72. hichissecured to the door 58 and has fulcrumedthereon a lever 73 which. is provided at one of its ends with a horizontal lip 74 having an opening 75 therein. The

opposite end of the lever 73 is provided with a cam edge 76 to contact with the surface of the door frame 59 adjacent to the hinged edge of the door.

' In Fig. 5 the molding 77 is shownas being broken away to illustrate the position of the parts and to show a contact plate 78 secured the cam edge 76 of the lever 73 will contact. In this arrangement a link 60 of the construction shown in Fig. 11 and previously' described is hookedto the bar 34 and connected to the lip 74 by means of a short cord 63 fastened at one of its ends in the opening/75 of said lever.

Now, in using this tripping device, the door 58 is closed, in which operation the lever 73 will be caused to assume the position shown in Fig.5 when it is apparent that the hook 61 of the link 60 can be placed in engagement with the bar 34 after which the .cord 63 can be made taut by drawing to the face of the frame 59 against which it in the proper direction through the con- 7 volutions 62 thereof, when it willbe understood that thebar 34 will be held out of locking engagement with its guides 33 and 35 as shown by dotted lines in Fig. 4 of the drawing. Upon opening the door, it is evi dent that the spring 39 will retract the bar 34 and thus allow the alarm to be given.

Having'thus fully described my invention,

' what I claim as new and desire to secure by Letters Patent is- A 1. A device of the character described, in-

eluding in combination with a main plate 1 i d guides on said plate and extended at oneof its ends beyo'ndthe edge of the latter, Silld bar having in one of its edgesa recess to engage the outer guide and'in its other edge a recessto' engagethe inner guide, said bar also having a detent adapted to engage said hammer arm when the loar is in its pro jected position, and means-at the outwardly projected portion'of'the bar to release the 2. In a cl'evice'of the charaoter describ'ed,

-e the combination With-amain plate provided on 'one of its faces-With an outer and an inner guide, of a splndlecentrally' and r0- tatably' mounted on said plate, a bell surroundinglthe spindle'and mounted-thereon,

, ani'arnr pivotallyconnectednear one of its ends to the plate" and having at its other end a hammeradapted to strike the bell, means uniting "the spindle and the hammer arm V-forvibrating the latter, a spring actuated bar having a longitudinally disposed slot tion; and means at the outer end of the bar to release the same. 1 WILLIAM J. DRIVER. 

